Cooled roller



y 1969 TAKAAI KUROKAWA ET AL 3,446,275

COOLED ROLLER Filed May 18, 1967 FIG. 2

United States Patent 3,446,275 COOLED ROLLER Takaai Kurokawa,Chigasaki-shi, and Mitsugu Fukuda, Kawasaki-shi, Japan, assignors toTokyo Shibaura Denki Kabushiki Kaisha, Kawasaki-shi, Japan, a jointstockcompany of Japan Filed May 18, 1967, Ser. No. 639,380 Claims priority,application Japan, Sept. 10, 1966, 41/ 85,305 Int. Cl. F28d 21/00; C03b13/00 US. Cl. 165-90 3 Claims ABSTRACT OF THE DISCLOSURE This inventionrelates to a roller and more particularly a roll operating at elevatedtemperature and requiring adequate cooling.

For example, the so-called ribbon type glass bulb blowing machinesutilize a pair of rotating feed rolls or rollers to form into a ribbonshaped glass blank a flow of molten glass supplied from an orificethrough the bottom of a glass melting furnace. The glass blank is thenfed to a plate conveyor and blown into a plurality of bulbs. As thesefeed rolls are heated by molten glass it is necessary to suitably coolthem by a coolant such as water.

In one form of a prior liquid cooled feed roll, cooling liquid issupplied to the roll in the radial direction from one end of a coolantsupply shaft extending through the shaft of the roll. With thisconstruction, it was impossible to obtain uniform distribution of flowvelocity within the roll as well as uniform cooling thereof.

It is an object of the present invention to provide an improved flowpath for cooling liquid within the roll or roller whereby to obtainuniform flow velocity of the cooling liquid and uniform cooling effectof various parts of the roller.

Another object of this invention is to provide a novel liquid cooledroll in which one or more solid metal cores of good heat conductivematerial are housed in the roller to increase the peripheral speed ofthe cooling liquid which flows in contact with the inner surface of theroller thus increasing the cooling effect and to equalize thetemperature of the cooling liquid.

Briefly stated, according to a preferred embodiment of this inventionthere is provided a roller comprising a shaft, a pair of end platessecured to the shaft, a hollow cylindrical drum clamped between the endplates, a core member made of a solid good heat conductive material andcontained in a space defined by the end plates and the drum, a pluralityof first radial passages radially extending through the core member atan intermediate point between opposite ends thereof, a plurality ofsecond radial passages on the opposite ends of the core member, acooling liquid supply passage extending through the shaft to supplycooling liquid to each of the first passage and an outlet passageextending through said shaft to exhaust cooling liquid through thesecond passages, the first and second radial passages being in com- "icemunication through an annular flow path between the drum and coremember.

For a more complete understanding of the invention, reference may be hadto the following description taken in connection with the accompanyingdrawing in which:

FIG. 1 shows a longitudinal sectional view of a feed roller shown inFIG. 2, taken along a line II; and

FIG. 2 shows a cross sectional view of the feed roller, taken along aline II-II in FIG. 1.

The feed roller shown in the accompanying drawing comprises a shaft 1provided with an axial cooling liquid inlet passage 2 and an axialoutlet passage 3, the inlet passage being communicated with a pluralityof radial openings 4 equally spaced around the periphery of shaft 1.

A pair of end plates 5 are secured on shaft 1 at points equally spacedfrom said openings 4 to clamp therebetween a roller drum 6, thus forminga roller. The roller contains a pair of generally annular core members 7constructed as follows. Each core member includes a central bore 7aadapted to receive shaft 1, a counterbored recess 7b on the inner endand a countersunk part 7c contiguous therewith. Between adjacent coremembers are a plurality of guide vanes 7d which may be integral with oneof the solid core members and slightly inclined with respect to theradial direction to define similarly inclined flow passages betweenvanes 7 which induce circumferential flow of the cooling liquid, asshown in FIG. 2. An annular ring 8 including a number of spaced openings8a in alignment with said openings 4 is seated in the counterboredrecesses 7b. On the outer end surface of each core member 7 are provideda plurality of radial grooves 9 angularly displaced from said openings4. These grooves 9 communicate with the inclined flow passages betweenvanes 7d through an annular fiow passage between roller drum 6 and coremembers and also communicate with the outlet passage 3 respectivelythrough ducts 10 in the axial direction and radial openings 11 which areprovided for shaft 1 between adjacent openings 4. The core members 7 aresecured to end plates 5 by means of dowel pins 12 and the like so thatthey can rotate with the shaft.

Alternatively, two core members 7 may be united into an integral member,in which case, instead of providing guide vanes 7d, a plurality ofcircumferentially spaced and slightly inclined openings are provided tocommunicate with openings 4.

In operation, cooling liquid supplied to inlet passage 2 flows radiallyoutwardly through openings 4 and passages between guide vanes 7d, thenaxially through a space between core member 7 and drum 6, radiallyinwardly through grooves 9 at the outer ends of the core member, axiallythrough ducts 10, and through radial openings 11 to the outlet passage3.

With the construction as above described, stagnation of the How ofcooling liquid in the roller is eliminated, and owing to thecircumferential flow of the cooling liquid afforded by inclined vanes9d, the cooling effect of the cooling liquid becomes substantiallyuniform throughout the roller, so that the various parts of the rollerheated by molten glass are cooled uniformly.

More particularly, the cooling liquid having a relatively large specificheat is brought into positive contact with the inner surface of theroller by said circumferential flow to effectively remove heattherefrom, while the solid metal core members having relatively highheat conductivity and large heat capacity function to equalize thetemperature of the cooling liquid and hence the temperature of theroller surface.

While the invention has been shown and described in connection with apreferred embodiment thereof, this invention is not limited thereto andincludes any modifications and alternations as fall within the truespirit and scope of this invention.

What is claimed is:

1. A roll comprising, a driven shaft, a pair of end plates secured tosaid shaft for rotation therewith, a hollow cylindrical drum clampedbetween said end plates, a solid core member mounted on said shaft madeof a heat conductive material and contained in a space defined by saidend plates and said drum, said core being spaced radially from said drumto form an annular flow path, between it and said drum, means defining afirst plurality of radial passages extending through said core member ata point intermediate opposite axial ends thereof, said radial passagesbeing inclined with respect to the radial direction, means defining asecond plurality of radial passageson the opposite ends of said coremember, a cooling liquid supply passage axially extending in said shaftto supply cooling liquid to each of said first plurality passages,'andan outlet passage extending axially in said shaft to exhaust coolingliquid from said second plurality of passages, the first and secondpluralities of radial passages having communication through said annularflow path.

2. A roll according to claim 1", wherein said core member is dividedinto two axially spaced identical sections,

' radial passages.

References Cited UNITED STATES PATENTS 1,939,967 12/1933 Fox et al.'l6590 2,956,348 10/1960 Mueller 16589 X FOREIGN PATENTS 1,000,2358/1965 Great Britain.

ROBERT A. OLEARY, Primary Examiner. T.- W. STREULE, Assistant Examiner.

